Inverted incandescent gas-lamp.



F. YOKEL.

vlNyERTIED INCANDI-ISCENTV GAS LAMP. APPLICATION FILED AUG.1|.1915.

' 1,254,105.. Patented @11.422, 1918.

2 SHEETS-SHEET 2- --UNITED sTATEs PATENT or YoKEL, or PITTSBURGH, rnmvsrMANIA, ASSIGNon To PITTSBURGH LAMP,

'BRASS GLASS COMPANY, 0F PITTSBURGH,

Y NEW JERSEY.

4PEITNSYLVANIA, A CORPORATION .'OF

- INvEnTED INCANDESGENT' Gasmamr.

Spebiication of Letters Patent.

Patented .13.11.22, 1918.

v Application led August 11, 1915. Serial'No. 44,865.

ATo all w'fiom t may concern.:

Be it known that I, FRANK YOKEL, a citizen of the United States, and resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Inverted Incandescent GasLamps, 4of Which the following is a specification.

This invention relates to improvements in incandescent gas lamps, and more particularly to those of the .inverted type.

The objects of my invention are to provide a structure of this type which ,is simple and efficient in operation,` readilyassembled, durable in construction, and which can be manufactured at a relatively low cost.

To these and -other ends, the nature of which will be l readily understoodas the invention is. hereinafter disclosed, my invention consists in the improved construction and combination of parts hereinafter duly described', illustrated in the accompanying drawing, and more 'particularly pointed out in the appended claims.

In the accompanying drawings, in which similar referencev characters indicate similar parts in each of the views,

' Figure l is a side elevation of a 1am ofv this typev with parts broken away to ilustrate certain relative positions.

Fig.- 2 is a vertical sectional View of. the

same. v

Fig. 3 is a vertical section taken at right angles to Fig. 2.

Lamps of this typ'e, and especially those of the inclosed' mantle type, are generally of a structure expensive to manufacture, lthe requirements relative to nprotection of the paratively large expense.

lamp against drafts, etc.,'ne cessitating the` use of complicated. structures, the produc# tion and assembling of which involve com- I have found,.through various tests, that many of the difficulties for which protection Y wasl provided couldbe overcome by various changes in the construction ,of the lamp body, and in a manner which greatly Vreduces the cost of production. For instance, it i-s well known'that by preheating the air which is employed in admiXed relation With the as, moreeficient service is had. To

obtain this result, it is the practice to sub-,-

ject the air conduit to the action of the products of combustion. This Ereheating action, however, 4must be in suc formv as to prevent the products from entering the alr belng admitted, as such roducts Would materially affect the combustion of the mix ture, not only affecting the candle power of the lamp, but also tending to provide a smoky action; hence, it has been the practice to provide special structural details the inflowing air can be effected without the use of special complicated structures, and at the same time, obtain the advantages due to preheating the air. This fact enables me to c ange the general structural arrangement of the lamp in a manner to greatlyI simplify its structure and at the same time` vproduce the desired coordination in operation and appearance, these changes lgreatly decreasing the cost of manufacture. A preferred construct-ion for obtaining these resuits is shown in the drawings, and is now described.

10 indicates the gas admission element having a suitable admission control, indicated at 11, al regulating device l2, and apilot tube 13, these being of well known construction. The element 10 is mounted at the upper end of the mixing tube 14, the latter communicating with the burner, shown at l5 as in the form of an incandescent mantle of the inverted type.

As"A shown, the connection between the mixing tube 14 and element 10 is provided by a member 16 threaded to both of these parts, said member 16 having openings 1a at diametrically opposite sides, .these open ings having a suitable circumferential length and preferably extending above and -below the point of gas exit from element :10. Mounted on the periphery of member 16, is a sleevelb provided with a plurality of axially-extending narrow slots 16e, these slots being arranged in two series diametrically. spaced apart. The sleeve is rotatably FICE.

to produce a proper A assem led, providing the desired result, the

adjustable on lthe member 16, being held in adjusted position by means of a set screw 16d, thus enabling a desired number of slots 16 to be exposed opposite the openings'16. 4

Thislmember 16 and sleeve V16" form the aira-dniission element leading to the mixing tube and controllable as to amount by the adjustability of the sleeve 16".

The casing for the lamp is providedin the form of a number of parts, each c.om,`

paratively simple instructural form and readll manufactured, these members, when ;f0r`the passage of the mixing tube 14 and the opening for the passage of the pilot burner tube. The side walls of the member V17 are tia-red outwardly, being provided with aslioulder 17b adjacent the plane of the bot tom 17a. The upper edge of this member 17 is preferably bent inwardly as shown, thus providing a rigid formation at the point of greatest diameter of this member.

Members 19 and 20 are flared in opposite directions 'and connected together at the points off-'greatest diameter, these members combinedly forming, the lowerV portion of the conduit for the products of' combustion and the support for the inner and outer A globes, member 19 being formed with a diametrically extending plate 19 having down* turned flanges 19h, said plate having 0penforthe passage of the mixing tube and '/the pilot tube. The member 20 carries .j nnular recess which is adaptedV to ref ceive an. annulus 20EL onv which the inner globe 21 is supported. Said member also carries the means for securing the "outer globe 22 in position. The member 19 -is also `provided with a shoulder 19C. l

Member 18 is cylindrical, being provided at-diametrically opposite sides wlth axiallyextending narrow elongated slots 18a. This member is'adapted to be positioned between membes'l' and 19, the opposite ends of member 18 abutting the shoulders 17IJ and 1,9,-respectively- The casing is assembled inthe following manner: As shown more particularly in Figs. 2and 3, the lower end ofthe member 16' provides a shoulder 16e with respect to the mixing tube. Mounted on the mixing tube and adapted to abut against said s houlfzler isa cross barV 23having an opening for the passage of the pilot tube and having its ends provided with projecting portions 23, he lowerY plane of which is spaced from the lower plane of the bar 23, these projecting portions being adapted to abut against the innerperiphery of member 17 opposite the contact. with the lower end ,of member 18.

A cross bar 24 vsubstantially similar to cross bar 23 is then slipped into position, its proj ecting portions 24 contacting with the infner wall of member 19 opposite shoulder 16.. A short length of tubing 25 is then' placed on the mixing tube, after which a nut 26 isV threaded onto the tube, this nut' serving to cla-mp the casing together the' clamping pressure being provided by tubular member i v 25 acting on cross bar 24, the pressure being resisted by cross bar 23 which is held in po# sition by shoulder 16e.

After the burner fixture and pilotburner have been placed in position, the mantle and the inner andl outer globes are positioned in the usual manner.

As will' be readily understoo d, ar.-

`rangement of the caslng is simple and'of such form as to be readily assembled with a minimum number of parts and threaded connections; lThe conduit for-the products of combustion' i provided l lby "members 18,-- 19 and 20, this conduit beingclosed at itsupper end by thev bottom 17a-of member'17,'tliejo11tlet 4for the products of combustion being thro-ugh the slots 18, By this arrangement, the products are led directly into contact with the bottom 17a which is thereby heated and acts to heat the air whichmay be immei 4d'iately above the bottom.'

.As-shown, the air inlet'ports are spaced a short' distance above the bottom 1,7, the major portion ofthe length 'of these ports being' below the top plane of member 17. 110' Consequently, the cup-shaped formation'of said member. 17 providesy a member' which tends to isolate the air immediately above the bottom 17a, causing it to rise, somewhat in the nature of an envelop, in proximity to the air-admission ports, the air supplied to the mixing tube coming from this source, the remainder simply assing upwardly along theexteriorof the tting 10. 1

l-Vhile the air inlet ports 16 extend be- '120 low the top plane of member 17, these ports are not located within the casing but external of it, no portion of the casing 'acting to restrict free access of air t0 these ports, the

ucts o combustion outwardly to a point suiiiciently spaced from the inlet ports as to 'practically eliminate'the possibility of these products entering the'point of supply of air for these ports. 130

loo.-

As will be readily understood, the prod- :ucts of combustion, being of a higher temof member 1T tending to force these products outwardly so that passing the upper plane of member 1T, they will be spaced a considerable distance from the ait-'admission ports and entirely without the envelop ot' heated air provided by the bottom 17a. Consequently, the upward travel of the envelop `will tend to draw the products upward above the plane of the air admission ports-and therefore away-trom such ports. However.y the ability to produce this action'is necessarily dependent on the supply of air to 'produce this envelop and at the same time supply the air tor the admixtnre with the gas, and this must be secured from without member 1'7.

To enable this resultto be obtained, the particular arrangement of slots 1Gc and 19a are provided. As before pointed out, these slots are arranged on diametricallyopposite sides of the members in which they are formed. The slotted portion are of a predetermined circuniferential length. these lengths being such thatwhen the parts are assembled, a plane connecting the slots 1Gc will intersectat approximately `right angles a similar plane connecting slots 18a, the cir cumferential length of the slotted portions being' such that the slots 18a will be out ot' vertical alinement with any portion of the slots'lGc. Consequently', the npwardly-liow-- ing currents external of member 1T will be made up ot alternate currents of air heated b v the exterior of the conduit and currents provided by the products of combustion. Since the air admission ports are arranged opposite the. unvitiated air currents. itl will be readily understood that even though these outer currents are partially diverted inwardly into the member 1T. the supply for the airadmissi on ports will be provided by the unyitiated air. those portions ofthese ascending currents carrying the products of combustion being opposite 'blank portions of the sleeve 16". Consequently. the supply of air is free from products of combustion.

By thus staggering the products outlet mld the air inlet. and by the use of the inemli lr 17. I am able to obtain vthe desired pref.v

ht ating action on the air to he supplied. and at the same tnne retain this an' trcc trom viti ltion hy the products. without the use oi any special conduit or other structure. the

member 1T not only performing a. usetul func ion in this: rcsi'iect but. as shown in Fig. A. giving an ornamental appearance to thc c: sing as well. )ts liciorc pointed out. the :..irticular arrangement shown enables.

tl'el construction to he provided hy thc'use.

ot' but.y few parts of' a simple character, thereby greatly reducing the cost ot' manufacture ot' the complete lamp without,honever` sacrificing any of the material teatures which are essential. in providing the maximum etliciencyl .\\'hile I have herein shown and described a preferred way in which my invention may be. carried out. 1t will be readily understood that changes and modilications therein may be required or desired to meet,- the exifrencies of use. and I reserve the right to ma te anyl and all such changes and modifications as may be tound necessary or desirable in so ,t'ar as the same may fall within the spirit verted type. gas and air admission means, a

mixing-tube. a burner. a sectional casing forming a conduitfor the products of combastion and including outer sect-ions and an intermediate section encircling" the mixingtube. said intermediate section having diametrically disposed outlet ports, a diaphragm in the conduit 'separating the inter mediate and the outer sections, diametrically extending members mounted on the Iniingtube. and means on the mixing-tube coop-v erating with said members for clamping the ,sections together,

'2. ln incandescent gas'lamps of inverted type. gas and air admission means having diametrically disposed air inlet ports, a mixing-tube. a burner. a sectional casing forming a conduit for the products of 'combustion and including outer sections'A and an intermediate section encircling the mixing-tube, said intermediate section having diametri'- cally disposed outlet ports, said" inlet .and outlet ports being positioned on planes intersecting each other at right angles, a, diaphragm in the conduit separating said ports, diametrically extending members mounted on the mixing-tube. and means on the mixing-tube co peratingl with. said members for clamping the sections together.

f5. In incandt-tsctait gas lamps ofthe inverted type. air and gas admission means, a mixing tube secured thereto to provide a shoulder at the lower end of said means, a casing ior the products of combustion `formed ot' sections adapted to encircle the mixing' tube. the outer sections having members extending diaiuetrit'ally across the conduit with the upper mci'nber acting to limit the conduit length. a cylindrical member moimted between and positioned by said outer memlwrs. and means on said mixing tube tor clamping said sections together, said shouldt-r forming an abutment operative in the clamping action.

l. ln incandescent lamps of the inverted typtair and gas admission means, a mixing tube secured thereto to provide a shoulder at the lower end of said means, a casing for the products of combustion. formed of sections adapted 5 the outer sections ing diametrica upper length,

encir'ele the mixing tube, having members extendlly across the conduit with the member acting to limit the conduita cylindrical member between and positioned by saidv outer members, and means 10 on said lmxmg tube for clampmg said seotions together` bar adapted t said means inoludimgl a cross o Contact Wlth said shoulder above said diaphragm, a, cross bar below the top plane of the opposite outer member, a sleeve on said mixing tube below said latter cross bar, and threaded means below and in Contact with said sleeve. l

In testimony whereof I affix my signature in presence of two Witnesses.

' FRANK YOKEL.

Vitnesses:

HORACE G. SEITZ, ALEX. S. MABON. 

